Mineral - Anapaite
Anapaite
Chemical Properties
Mineral Class
Phosphates
Toxicity
none
Formula
Ca₂Fe²⁺[PO₄]₂ · 4 H₂O
Unit Cell
a=6.45 b=6.82 c=5.90 α=102° β=104° γ=71° Z=1
Physical Properties
Hardness
3.5
Streak
white
Density
Normal (2-3,5)
Cleavage
Completely after {001}, indistinc after {010}
Fracture
Tenacity
Elastic-flexible
Optical Properties
Color
green
Birefringence
0,047
Luster
Vitreous
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
triclinic
Point Group
triclinic-pinacoidal - 1
Space Group
P 1 (2)
Habit
spherical, rosette, tabular
Formation
Sedimentary, oxidation zone of oolitic iron ores, replaces organic structures (shells etc.)
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Anapaite
Composition
Elements
Mass
P₂O₅
35.51
FeO
18.07
CaO
27.77
H₂O
18.47
Russia (Palache et al. 1952)
Name and first discovery : Named after the type locality "Anapa" in Russia. Discovered in 1902.
Chemistry :
Synonyms : Tamanite
Varieties :
Abbreviation : Anp
literature
Palache, C., Berman, H., & Frondel, C. (1952). Dana's system of mineralogy. Geologiska Föreningen i Stockholm Förhandlingar , 74 (2), 218-219.